Im trying to build a Ubuntu FileServer. NFS or Samba

Setup:

Ubuntu Server 8.04 LTS

sda - 40G - System
sdb - 1TB
sdc - 1TB

md0 - sdb and sdc on RAID1

df -h

Filesystem Size Used Avail Use% Mounted on
/dev/sda1 28G 648M 26G 3% /
varrun 2.0G 180K 2.0G 1% /var/run
varlock 2.0G 0 2.0G 0% /var/lock
udev 2.0G 80K 2.0G 1% /dev
devshm 2.0G 0 2.0G 0% /dev/shm
/dev/md0 925G 653M 877G 1% /mnt


Question.
How to make a shared folder on my 1TB raid.